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Ultegra BB compatible with tiagra cranks?

HellsCyclistHellsCyclist Posts: 122
edited May 2014 in Workshop
My road bike has FC4600/4603/4650 written on the cranks. Basically they are tiagra. I was thinking about buying this bottom bracket bearings: ... -prod38998

However the thing it says about "larger axle diameter" in the description has me wondering over compatibility issues. Otherwise Im considering these: ... lsrc=aw.ds

Which seem censored for not much less money. What about crank axle diameters when changing from 105 to tiagra or ultegra etc?


  • k-dogk-dog Posts: 1,652
    Yes, they're the same size - I did the same and replaced my 105 with Ultegra when it was due - barely more expensive and should be a bit better.

    All the Hollowtech2 axles are the same so you can swap them around.
    I'm left handed, if that matters.
  • maddog 2maddog 2 Posts: 8,114

    any road Shimano HT2 BB will work
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
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